<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="最多bb120字" maxlength="120" v-model="msg"></textarea>

        <mt-button type="primary" size='large' @click="postComment">发表评论</mt-button>
        
        <div class="cmt-list" v-for="(item, i) in comments" :key="item.add_time">
            <div class="cmt-item" >
                <div class="cmt-title" >
                    第{{i+1}}楼&nbsp;&nbsp;用户:{{item.user_name}}&nbsp;&nbsp;发表时间：
                    {{item.add_time | dateFormat}}
                </div>
                <div class="cmt-body">
                   {{item.content === 'undefined' ? '用户很懒': item.content}}
                </div>
            </div>
           
        </div>

        <mt-button type="danger" size='large' plain @click="getMore">加载更多</mt-button>

    </div>
</template>
<script>
import {Toast } from "mint-ui"





export default {
    data(){
        return {
            pageIndex:1,//默认展示第一页数据
            comments:[],//所有的评论数据
            msg:''//评论输入的内容
        };
    },
    created(){
        this.getComments();
    },
    methods:{
          getComments(){ //获取新闻 列表
            this.$http.get("api/getcomments/"+this.id+"?pageindex="+this.pageIndex).then(result =>{
                if(result.body.status === 0){
                    // this.comments = result.body.message;
                    //数据拼接
                     this.comments = this.comments.concat(result.body.message)
                }else{
                    Toast('获取新闻列表失败')
                }
            })
        },
        getMore(){//加载更多
        this.pageIndex++;
        this.getComments();
        },
        postComment(){//发表评论
        // 参数1；url
        //参数2
        //参数3 emulatejSON=TRUE
        if(this.msg.trim().length === 0){
            return Toast('评论内容不能为空')
        }
        this.$http.post('api/postcomment/'+ this.$route.params.id,{content:this.msg.trim()})
        .then(result =>{
                if (result.body.status === 0){
                 var cmt = {user_name:'匿名用户',add_time:Date.now(),
                 content:this.msg.trim()}
                 this.comments.unshift(cmt)
                 this.msg=""
                }else{
                    Toast('获取新闻失败')
                }
            })

        }

    },
    props:["id"]
    
}
</script>

<style lang="scss" scoped>
.cmt-container{
    h3{
        font-size: 18px;
    }
    textarea{
        font-size: 14px;
        height: 85px;
        margin: 0;
    }
    .cmt-list{
        margin: 5px 0;
        .cmt-item{
            font-size: 13px;
            .cmt-title{
                line-height: 30px;
                background-color: #ccc;
            }
            .cmt-body{
                line-height: 35px;
                text-indent:2em ;

            }

        }
    }
}
    
</style>